Piston pump
HENGYUHANG Axial piston variable pump HYH10VO series 32
HENGYUHANG HYH10VO Series 32 is a heavy-duty swashplate axial piston variable displacement pump engineered for open-circuit hydrostatic systems, delivering continuous 280 bar nominal pressure (350 bar peak), hydrostatically unloaded cradle bearings, integrated measurement sensor ports on high-pressure port plates 22/72 and 32/82, universal through-drive capability, and optional Pre-Compression Volume (PCV) pulsation damping across mobile and industrial machinery.
| Applications
Engineered for demanding open-loop hydraulic circuits in mobile and stationary machinery including hydraulic excavators, mobile cranes, concrete pump trucks, heavy-duty wheel loaders, drilling rigs, material handling equipment, agricultural harvesters, and industrial hydraulic power packs requiring rugged 280 bar continuous pressure performance, high operating reliability, and flexible universal through-drive pump compounding.
| Key Technical Specifications
Product Model: HYH10VO Series 32 (Sizes 45, 71, 100, 140, 180)
Brand Replacement: Bosch Rexroth A10VO Series 32 (Sizes 45, 71, 100, 140, 180; open circuit), OEM or as requested.
Displacement: 45.0 / 71.1 / 100.0 / 140.0 / 180.0 cm³/rev
Rotation Direction: Clockwise (R) or Counter-clockwise (L), viewed from drive shaft end
Speed Range: Nominal rating n nom 1,800–3,000 rpm at Vg max (minimum operating speed n min = 500 rpm)
Peak Pressure: Nominal continuous pressure p nom = 280 bar (4,000 psi) / Maximum peak pressure p max = 350 bar (5,100 psi)
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| Overview of HENGYUHANG HYH10VO Series 32 Hydraulic Pumps
The HENGYUHANG HYH10VO Series 32 is an advanced swashplate-design axial piston variable displacement pump optimized for medium-to-high pressure open-circuit hydrostatic drive systems. Engineered as an exact 1:1 drop-in replacement for the global Bosch Rexroth A10VO Series 32 product family, this series encompasses all five high-output displacement frame sizes: 45, 71, 100, 140, and 180 cm³/rev.
Fluid delivery is directly proportional to drive speed and cradle swashplate angle, allowing infinitely variable adjustment from maximum displacement down to zero flow. Featuring hydrostatically unloaded cradle bearings for reduced friction and extended service life, an integrated high-pressure measurement sensor port (MB) on port plates 22/72 and 32/82, universal through-drive capability for flexible multi-pump compounding, and optional Pre-Compression Volume (PCV) technology that reduces pressure pulsation by 30% to 50% and dramatically lowers machine noise, the HYH10VO Series 32 provides superior functional reliability, outstanding power-to-weight ratio, and an extensive suite of modular hydraulic, electrohydraulic, and power controllers (including DR pressure regulators, DRF/DRS/DRSC load-sensing flow controllers, LA hyperbolic power controllers, ED/ER electrohydraulic pressure controls, and EC4/EB4 electro-proportional valves).
| Dimension of HENGYUHANG HYH10VO Series 32 Hydraulic Pumps
| Mechanical Installation Interface Specifications
| Frame Size (HYH10VO) | Mounting Flange Standard (ISO 3019-1 / SAE) | Drive Shaft Options (ANSI B92.1a Involute Spline) | Working Pressure Port B (ISO 6162 / SAE J518) | Suction Port S (ISO 6162 / SAE J518) | Dual Case Drain Ports L / L1 (ISO 11926) | Pilot Pressure Port X (ISO 11926) | Measurement Port MB (ISO 11926) |
|---|---|---|---|---|---|---|---|
| HYH10VO45 | 2-Hole SAE 101-2 (B) or 4-Hole SAE 127-4 (D) Ø101.6 mm | S: 1 in 15T 16/32DP; R: 1 in 15T (Reinforced); U: 7/8 in 13T 16/32DP | 1 in (M10×1.5, 17 deep / UNC 3/8-16) | 1 1/2 in (M12×1.75, 20 deep / UNC 1/2-13) | 7/8-14UNF-2B (17 deep; max 2 bar) | 7/16-20UNF-2B (11.5 deep; 350 bar) | 7/16-20UNF-2B (Port plates 22/72 & 32/82) |
| HYH10VO71 | 2-Hole SAE 127-2 (C) or 4-Hole SAE 127-4 (D) Ø127.0 mm | S: 1 1/4 in 14T 12/24DP; R: 1 1/4 in 14T (Reinforced); U: 1 in 15T / W: 1 in 15T | 1 in (M10×1.5, 17 deep / UNC 3/8-16) | 2 in (M12×1.75, 20 deep / UNC 1/2-13) | 7/8-14UNF-2B (17 deep; max 2 bar) | 7/16-20UNF-2B (11.5 deep; 350 bar) | 7/16-20UNF-2B (Port plates 22/72 & 32/82) |
| HYH10VO100 | 4-Hole SAE 152-4 (D) or 2-Hole SAE 127-2 (C) Ø152.4 mm | S: 1 1/2 in 17T 12/24DP; U: 1 1/4 in 14T 12/24DP; W: 1 1/4 in 14T (High torque) | 1 1/4 in (M14×2, 19 deep / UNC 1/2-13; High-Pressure Series) | 2 1/2 in (M12×1.75, 17 deep / UNC 1/2-13) | 1 1/16-12UNF-2B (20 deep; max 2 bar) | 7/16-20UNF-2B (11.5 deep; 350 bar) | 7/16-20UNF-2B (Port plates 22/72 & 32/82) |
| HYH10VO140 | 2-Hole SAE 127-2 (C) or 4-Hole SAE 152-4 (D) Ø127.0 / Ø152.4 mm | S: 1 3/4 in 13T 8/16DP; U: 1 1/2 in 17T 12/24DP; W: 1 1/2 in 17T (High torque) | 1 1/4 in (M14×2, 19 deep / UNC 1/2-13; High-Pressure Series) | 2 1/2 in (M12×1.75, 17 deep / UNC 1/2-13) | 1 1/16-12UNF-2B (20 deep; max 2 bar) | 7/16-20UNF-2B (11.5 deep; 350 bar) | 7/16-20UNF-2B (Port plates 22/72 & 32/82) |
| HYH10VO180 | 4-Hole SAE 152-4 (D) Spigot Ø152.4 mm | S: 1 3/4 in 13T 8/16DP; W: 1 1/2 in 17T 12/24DP (High torque) | 1 1/4 in (M14×2, 19 deep / UNC 1/2-13; High-Pressure Series) | 3 in (M16×2, 24 deep / UNC 5/8-11) | 1 5/16-12UN-2B (20 deep; max 2 bar) | 7/16-20UNF-2B (11.5 deep; 350 bar) | 7/16-20UNF-2B (Port plates 22/72 & 32/82) |
| Port Plate Layout Configurations
Port Plate 11 / 61: Rear SAE flange ports, metric / UNC fastening thread (not suitable for through drive, code N00 only).
Port Plate 12 / 62: Lateral opposite SAE flange ports, metric / UNC fastening thread (for dedicated through-drive code Kxx).
Port Plate 22 / 72: Lateral opposite SAE flange ports, metric / UNC fastening thread, equipped with universal through drive U.. (without pulsation damping). Includes high-pressure measurement sensor port MB.
Port Plate 32 / 82: Lateral opposite SAE flange ports, metric / UNC fastening thread, equipped with universal through drive U.. and integrated Pre-Compression Volume (PCV) pulsation damping. Includes high-pressure measurement sensor port MB.
| Pump Installation Specifications
| Complete Ordering Code Structure
HYH10V−O−[Size]−[Control]/32 [Rotation]−V[Shaft][Flange][Port Plate][Through Drive]−[Connector][Sensor]
| Position | Code Segment | Available Designations & Options | Technical Description & Functional Purpose |
|---|---|---|---|
| 01 | Axial Piston Unit | HYH10V / A10V | Swashplate design, variable displacement, nominal pressure 280 bar, peak 350 bar |
| 02 | Operating Mode | O | Pump, open-circuit hydrostatic drive |
| 03 | Geometric Frame Size | 45, 71, 100, 140, 180 | Rated geometric displacement in cm³/rev |
| 04 | Control Devices | DR / DRG; DRF / DRS / DRSC; LA.D / LA.DS / LA.DG / LA.S; ED71 / ED72; ER71 / ER72; EC4 / EB4 | DR / DRG: Pressure controller (standard hydraulic or remote controlled); DRF / DRS / DRSC: Pressure and flow controller (load-sensing; X-T open, plugged with flushing, or without flushing); LA.D / LA.DS / LA.DG / LA.S: Power controller with pressure cut-off and flow control (beginning of control: LA5D ≤50 bar, LA6D 51…90 bar, LA7D 91…160 bar, LA8D 161…240 bar, LA9D >240 bar); ED71 / ED72: Electrohydraulic pressure control, negative control (12V DC / 24V DC); ER71 / ER72: Electrohydraulic pressure control, positive control (12V DC / 24V DC); EC4 / EB4: Electrohydraulic proportional control valve (positive EC4 / negative EB4, 12V–24V DC) |
| 05 | Series / Design Index | 32 | Series 3, Index 2 |
| 06 | Direction of Rotation | R, L | Clockwise (R) or Counter-clockwise (L), viewed facing drive shaft |
| 07 | Sealing Material | V | FKM (fluorocarbon rubber) high-temperature dynamic seals |
| 08 | Drive Shaft Type | S, R, U, W | S: ANSI B92.1a spline (standard); R: Reinforced spline for higher torque; U: Undersized spline; W: High-torque reduced spline |
| 09 | Mounting Flange | C, D, U | C: SAE 2-hole flange (SAE B for 45; SAE C for 71/100/140); D: SAE 4-hole flange (SAE C for 45/71; SAE D for 100/140/180); U: SAE C 2-hole special (Size 71) |
| 10 | Working Line Ports | 11, 12, 22, 32, 61, 62, 72, 82 | 11/61: Rear ports; 12/62: Lateral ports (dedicated through drive K..); 22/72: Lateral ports with universal through drive U..; 32/82: Lateral ports with universal through drive U.. and PCV damping |
| 11 | Through-Drive Flange | N00, Kxx, Uxx | N00: None; Kxx: Dedicated through drive (K01, K52, K68, K04, K07, K24, K15, K17); Uxx: Universal through drive (U00, U01, U52, U68, U04, U07, U24, UE2, U15, U17) |
| 12 | Connector for Solenoid | Blank / P | Blank: Purely hydraulic control; P: Molded DEUTSCH 2-pin connector (DT04-2P) without suppressor diode |
| 13 | Swivel Angle Sensor | Blank / H / P | Blank: Without sensor; H: Ratiometric electric angle sensor (PAL, 5V DC); P: SENT digital protocol |
| Reading Your Replacement Code
| Rexroth OEM Model Code | HENGYUHANG Drop-In Code | Displacement | Control Mechanism | Mounting & Drive Shaft | Porting & Through Drive |
|---|---|---|---|---|---|
| A10VO45DRF/32R-VSC12N00 | HYH10VO45DRF/32R-VSC12N00 | 45.0 cm³/rev | Pressure & flow control (LS, DRF) | SAE 101-2 2-bolt flange, ANSI 1" 15T spline | Side SAE ports (M10), without through drive |
| A10VO71DRS/32R-VSC22U68 | HYH10VO71DRS/32R-VSC22U68 | 71.1 cm³/rev | Pressure & flow control (DRS with flushing) | SAE 127-2 2-bolt flange, ANSI 1 1/4" 14T spline | Side ports, universal through drive SAE B (13T) |
| A10VO100LA7DS/32R-VSD32U04 | HYH10VO100LA7DS/32R-VSD32U04 | 100.0 cm³/rev | Power + LS control (LA7DS, 91–160 bar) | SAE 152-4 4-bolt flange, ANSI 1 1/2" 17T spline | Side ports with PCV damping, universal SAE B (15T) |
| A10VO140ED72/32R-VSD22U07-P | HYH10VO140ED72/32R-VSD22U07-P | 140.0 cm³/rev | Electrohydraulic pressure (24V negative) | SAE 152-4 4-bolt flange, ANSI 1 3/4" 13T spline | Side ports, universal SAE C (14T), DEUTSCH plug |
| A10VO180DRF/32R-VSD32U17 | HYH10VO180DRF/32R-VSD32U17 | 180.0 cm³/rev | Pressure & flow control (LS with PCV) | SAE 152-4 4-bolt flange, ANSI 1 3/4" 13T spline | Side ports with PCV damping, universal SAE D (13T) |
Technical Specifications of HENGYUHANG HYH10VO Series 32 (Sizes 45–180)
4.1 Frame Size Performance Matrix (Data at pₐᵦₛ=1.0 bar at suction port S, mineral oil ρ=0.88 kg/L)
| Performance Parameter | Unit | HYH10VO45 | HYH10VO71 | HYH10VO100 | HYH10VO140 | HYH10VO180 |
|---|---|---|---|---|---|---|
| Max Geometric Displacement (Vgₘₐₓ) | cm³/rev | 45.0 | 71.1 | 100.0 | 140.0 | 180.0 |
| Max Continuous Speed at Vgₘₐₓ (nₙₒₘ) | rpm | 3,000 | 2,550 | 2,300* | 2,200 | 1,800 |
| Minimum Operating Speed (nₘᵢₙ) | rpm | 500 | 500 | 500 | 500 | 500 |
| Continuous Flow Rate (qV at nₙₒₘ) | L/min | 135 | 181 | 230 | 308 | 324 |
| Continuous Drive Power (P at Δp=280 bar) | kW | 63 | 85 | 107 | 144 | 151 |
| Continuous Drive Torque (M at Δp=280 bar) | Nm | 200 | 317 | 446 | 624 | 802 |
| Continuous Drive Torque (M at Δp=100 bar) | Nm | 72 | 113 | 159 | 223 | 286 |
| Drive Shaft Torsional Stiffness S (c) | kNm/rad | 37.5 | 71.9 | 121.1 | 169.5 | 227.2 |
| Drive Shaft Torsional Stiffness R (c) | kNm/rad | 41.0 | 76.5 | — | — | — |
| Drive Shaft Torsional Stiffness U (c) | kNm/rad | 30.1 | 52.8 | 91.1 | On request | — |
| Drive Shaft Torsional Stiffness W (c) | kNm/rad | 34.5 | 57.5 | 101.8 | 165.6 | — |
| Rotary Moment of Inertia (J_TW) | kg·m² | 0.00350 | 0.00870 | 0.01670 | 0.02420 | 0.03300 |
| Max Permissible Angular Acceleration (α) | rad/s² | 4,000 | 2,900 | 2,400 | 2,000 | 2,000 |
| Housing Case Fluid Volume | L | 1.00 | 1.60 | 2.20 | 3.00 | 2.70 |
| Dry Weight (Port plate 11/12 N00, approx.) | kg | 25.8 | 40.4 | 56.4 | 70.5 | 75.2 |
| Dry Weight (Port plate 12 with Kxx through drive) | kg | 27.4 | 43.3 | 62.6 | 79.5 | — |
| Dry Weight (Port plate 22/32 with Uxx universal drive) | kg | 32.6 | 51.8 | 76.0 | 90.2 | 89.4 |
*Note: For Size 100 equipped with port plate 32/82 (PCV damping), maximum nominal speed is 2,150 rpm.
4.2 Operating Pressure Boundaries
| Pressure Characteristic | Value | Definition & Operational Guidelines |
|---|---|---|
| Nominal Operating Pressure (pₙₒₘ) | 280 bar (4,000 psi) | Maximum continuous design fatigue pressure according to ISO standards |
| Maximum Peak Pressure (pₘₐₓ) | 350 bar (5,100 psi) | Maximum transient peak within single operating period (t≤2.5 ms, total accumulated ≤300 h) |
| Minimum Pressure on High-Pressure Port B | ≥10 bar (145 psi) absolute | Minimum high-pressure side rating required to prevent rotary group separation damage |
| Rate of Pressure Change (RAₘₐₓ) | 16,000 bar/s (232,000 psi/s) | Maximum permissible speed of pressure rise and reduction across operating range |
| Suction Port Pressure (pₛ at Port S) | ≥0.8 bar (12 psi) absolute | Minimum continuous suction pressure; maximum permissible p_S max=10 bar (145 psi) absolute |
| Case Drain Permissible Pressure (p_L, p_L1) | ≤2.0 bar (30 psi) absolute | Maximum 0.5 bar higher than inlet pressure at port S; case must always exceed ambient pressure |
| Pilot Pressure Line Port X | ≤350 bar (5,100 psi) | Maximum external pilot pressure rating for control circuits |
4.3 Hydraulic Fluid & Temperature Operational Limits
| Fluid Characteristic | Permissible Value | Operational Note |
|---|---|---|
| Recommended Fluid Media | Mineral oil (HLP to DIN 51524) | High-performance petroleum-based hydraulic fluid with anti-wear additives |
| Optimum Operating Viscosity (νₒₚₜ) | 16 to 36 mm²/s | Optimal balance of volumetric efficiency and mechanical longevity |
| Continuous Operating Viscosity | 10 to 400 mm²/s | Full performance across standard operating temperature envelope |
| Minimum Viscosity (νₘᵢₙ) | 7 to 10 mm²/s | Short-term limit (t≤3 min) at p≤0.3⋅pₙₒₘ, T_max=+110 ∘C measured at drain port L / L1 |
| Maximum Viscosity at Cold Start (νₘₐₓ) | 1,600 mm²/s | Permissible at cold start (p≤50 bar, n≤1,000 rpm, ϑ_St≥−25 ∘C, warm-up ≤3 min) |
| Permissible Fluid Temperature Range | −25 ∘C to +110 ∘C (−13 ∘F to +230 ∘F) | Full operating phase with standard FKM fluorocarbon dynamic seals |
| Fluid Cleanliness Class | ISO 4406 Class 20/18/15 | At elevated temperatures (+90 ∘C to +115 ∘C), maintain Class 19/17/14 |
| Alternative Fluids | HETG, HEES, HEPG, HFDU | Environmental fluids; observe specific operating viscosity boundaries |
Product Advantages
Hydrostatically Unloaded Cradle Bearings
Advanced hydrostatic balancing reduces cradle friction, eliminates metal-to-metal wear during swiveling, and extends pump service life under severe duty cycles.
Pulsation Damping with Pre-Compression Volume (PCV)
Integrated PCV technology on connection plates 32/82 reduces hydraulic pressure pulsation by 30% to 50%, dramatically suppressing airborne machine noise in operator cabs.
Universal Through-Drive Architecture
Universal through-drive port plates 22/72 and 32/82 accept standard modular mounting kits (U01 to U17), enabling flexible field retrofitting of auxiliary pumps with 100% torque transmission.
Dedicated High-Pressure Diagnostic Port (M_B)
Factory-integrated gauge and sensor connection port on port plates 22/72 and 32/82 allows real-time pressure monitoring and digital system telemetry without external tee fittings.
Expansive Frame Sizes up to 180 cm³/rev
Covers high-power mobile machinery demands with displacements of 45, 71, 100, 140, and 180 cm³/rev at continuous 280 bar working pressure.
Precision 1:1 OEM Drop-In Compatibility
Exact adherence to Bosch Rexroth A10VO Series 32 installation dimensions, SAE mounting flanges, ANSI splines, and port drillings guarantees direct field replacement without machine rework.
Interchangeability & Cross Reference
6.1 Direct Replacement Matrix: Bosch Rexroth A10VO Series 32 to HENGYUHANG HYH10VO Series 32
| Rexroth OEM Model | Displacement | Mounting Flange Standard | Drive Shaft Specification | Working Port Connection | Direct Replacement |
|---|---|---|---|---|---|
| A10VO45 | 45.0 cm³/rev | SAE 101-2 (B) 2-Hole / SAE 127-4 (D) 4-Hole | ANSI 1 in 15T Spline (S / R / U) | SAE J518 1" Port B / 1 1/2" Port S (Plates 11/12/22/32) | HYH10VO45 |
| A10VO71 | 71.1 cm³/rev | SAE 127-2 (C) 2-Hole / SAE 127-4 (D) 4-Hole | ANSI 1 1/4 in 14T Spline (S / R / U / W) | SAE J518 1" Port B / 2" Port S (Plates 11/12/22/32) | HYH10VO71 |
| A10VO100 | 100.0 cm³/rev | SAE 152-4 (D) 4-Hole / SAE 127-2 (C) 2-Hole | ANSI 1 1/2 in 17T Spline (S / U / W) | SAE J518 1 1/4" Port B / 2 1/2" Port S (Plates 11/12/22/32) | HYH10VO100 |
| A10VO140 | 140.0 cm³/rev | SAE 127-2 (C) 2-Hole / SAE 152-4 (D) 4-Hole | ANSI 1 3/4 in 13T Spline (S / U / W) | SAE J518 1 1/4" Port B / 2 1/2" Port S (Plates 11/12/22/32) | HYH10VO140 |
| A10VO180 | 180.0 cm³/rev | SAE 152-4 (D) 4-Hole Spigot Ø152.4 mm | ANSI 1 3/4 in 13T Spline (S / W) | SAE J518 1 1/4" Port B / 3" Port S (Plates 11/12/22/32) | HYH10VO180 |
6.2 Common Control Assembly Cross Reference
| Target Rexroth Function | OEM Controller Code | Equivalent | Functional Characteristic |
|---|---|---|---|
| Pressure Regulator | DR | HYH-DR | Maintains constant system pressure by swiveling pump to zero flow at cut-off |
| Remote Pressure Regulator | DRG | HYH-DRG | Remotely adjustable pressure limiter via external hydraulic pilot relief valve |
| Load-Sensing Flow Control | DRF / DRS / DRSC | HYH-DRF / HYH-DRS | Matches pump flow to actuator demand (Δp=14…25 bar); DRS includes internal flushing |
| Power Controller + Cut-off | LA.D | HYH-LA.D | Hyperbolic input torque/power limitation combined with pressure cut-off |
| Power + LS Control | LA.DS | HYH-LA.DS | Hyperbolic power regulation integrated with load-sensing flow and pressure cut-off |
| Electrohydraulic Pressure Control | ED71 / ED72 | HYH-ED71 / HYH-ED72 | Proportional pressure regulation, negative characteristic (12V DC / 24V DC) |
| Electrohydraulic Pressure Control | ER71 / ER72 | HYH-ER71 / HYH-ER72 | Proportional pressure regulation, positive characteristic (12V DC / 24V DC) |
| Electro-Proportional Valve | EC4 / EB4 | HYH-EC4 / HYH-EB4 | Integrated proportional pilot control valve (positive EC4 / negative EB4, 12V–24V DC) |
Brand Replacement
Bosch Rexroth: Primary 1:1 direct interchangeability for A10VO Series 32 open-circuit variable displacement pumps.
Danfoss: Series 45 open-circuit pumps; Parker Hannifin (P1/PD Series) and Eaton open-circuit pumps engineered upon request.
Applications
Heavy Construction Excavators: Primary hydraulic supply for boom, arm, bucket, and auxiliary high-flow attachments.
Mobile Cranes & Reach Stackers: Precision load hoisting, boom telescoping, and outrigger leveling circuits.
Concrete Pump Trucks: Core hydraulic feed for high-pressure concrete delivery cylinders and boom articulation.
Heavy Wheel Loaders & Mining Equipment: Steering priority, bucket lift/tilt, and auxiliary hydraulic work tools.
Hydraulic Drilling Rigs & Piling Equipment: Rotary head drive, feed cylinders, and clamp chuck actuation.
Industrial Stationary Power Units: Heavy metal forming presses, recycling scrap balers, and injection molding clamping units.
Packaging & Shipping
| Packaging Layer | Specification & Protection Material | Safety Standard |
|---|---|---|
| Inner Protection | Corrosion-inhibiting VCI plastic wrap, desiccants, and heavy-duty port thread plugs | Prevents moisture, atmospheric corrosion, and debris contamination |
| Shock Cushioning | Custom-molded high-density expanded polyethylene (EPE) foam enclosure | Absorbs severe multi-axis transit impacts and protects shaft extensions |
| Outer Enclosure | ISPM-15 export-certified solid fumigation-free engineered wooden crate | Structural reinforcement for global ocean, air, and multimodal handling |
| Logistics Options | Express Courier (DHL, FedEx, UPS), Air Freight, LCL/FCL Ocean Cargo, DDP door-to-door | Dispatch in 48–72 hours for standard configurations; tailored tracking provided |
Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: State-of-the-art multi-axis CNC machining centers, precision spherical grinding equipment, and sub-micron gear and bearing fitment (Ra<0.2 μm) guarantee superior rotary group alignment and low internal leakage.
100% Full-Cycle Multi-Parameter Factory Inspection: Every HYH10VO pump undergoes automated test-bench trials verifying volumetric efficiency (>94%), continuous and peak pressure hold at 280/350 bar, internal case leakage limits, response hysteresis, and vibration/noise spectra prior to dispatch.
Seamless 1:1 OEM Drop-In Interchangeability: Engineered to match European DIN, ISO, and SAE standards down to the millimeter, allowing immediate replacement of Bosch Rexroth A10VO Series 32 units with zero pipe rework or bracket modification.
Flexible Engineering Customization & Rapid Prototyping: In-house hydraulic engineering team provides tailored control-valve calibrations, special shaft profiles, auxiliary flushing ports, and rapid prototype turnarounds with minimal MOQ requirements.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: Continuous inventory of finished cast bodies, bearing kits, rotary groups, and modular controllers enables standardized orders to ship globally within 48 to 72 hours.
12-Month Comprehensive Warranty & Lifetime Technical Support: All units are backed by an unconditional 12-month factory warranty, 24-hour drawing verification service, and lifetime engineering consultation from certified fluid power specialists.
HENGYUHANG Axial Piston Variable Pump HYH10VO Series 32 (Variable Swashplate Open-Circuit Hydraulic Pump, 45.00~180.00 cm³/rev) is an optimized, heavy-duty medium-pressure variable-displacement axial piston pump designed in swashplate rotary architecture for demanding hydrostatic open-circuit drives in high-power mobile machinery, heavy construction equipment, agricultural tractors, and industrial power units. Manufactured by Quanzhou Hengyuhang Power Technology Co., Ltd. as an engineered, direct-fit replacement line designed to match the benchmark performance, mounting dimensions, pressure tiers, and hydraulic characteristics of the Rexroth A10VO Series 32, the HYH10VO Series 32 is built to the technical benchmark standards defined in official OEM documentation (RE 92705). Fluid delivery flow is directly proportional to drive speed and swashplate displacement angle, allowing smooth, stepless variable modulation from zero to maximum flow. Operating at an elevated nominal continuous pressure of 280 bar (4100 psi / 28 MPa) and a maximum peak operating pressure of 350 bar (5100 psi / 35 MPa) across 5 primary displacement sizes—45, 71, 100, 140, and 180 cm³/rev—the HYH10VO Series 32 features a hydrostatically unloaded cradle bearing design for extended mechanical service life and enhanced functional reliability under heavy cyclic loads. Available with dedicated pressure measurement sensor ports (MB) on the high-pressure service port for sizes with port plates 22/72 and 32/82, universal rear through-drives (U-series) enabling 100% full-torque transfer for multi-pump combinations across all sizes, and optional internal pulsation damping (port plates 32/82) for whisper-quiet machine operation, the HYH10VO Series 32 supports a versatile controller portfolio including hydraulic pressure controllers (DR/DRG), load-sensing flow controllers (DRF/DRS/DRSC), electrohydraulic pressure controllers (ED71/ED72, ER71/ER72), and hyperbolic power-limiters (LA5D~LA9D), delivering a proven, world-class drop-in replacement.
| Applications
The HYH10VO Series 32 variable swashplate pump is engineered specifically for open-circuit heavy mobile work hydraulics and high-power industrial installations requiring high continuous power density, low operating noise, and advanced electrohydraulic control:
Heavy Construction & Excavation Machinery: Primary implement and auxiliary hydraulic pump for medium and large crawler excavators, heavy wheel loaders, trenchers, and rotary drilling rigs.
High-Horsepower Agricultural Tractors: Powers high-capacity electrohydraulic hitch linkages, remote proportional hydraulic valves, steering priority circuits, and combine harvester header drives.
Mobile Cranes & Material Handling Reach Stackers: Supplies responsive hydraulic power for telescopic boom extension, heavy winch hoist drives, outrigger leveling cylinders, and slewing auxiliary circuits.
On-Demand Radiator Fan Drive Systems: Proportional speed regulation of large radiator and hydraulic cooler fans on mining dump trucks, diesel gensets, and heavy industrial power packs using ED71/ED72 electrohydraulic control.
Concrete Transit Mixers & Stationary Pumps: Powers continuous-duty concrete placing booms, agitator drum rotation, water wash pumps, and hydraulic stabilization outriggers.
Multi-Circuit Tandem Power Packs: Utilizes standardized universal through-drives (U-series) with port plates 22/72 and 32/82 to drive secondary piston or gear pumps up to 100% torque transfer across all frame sizes.
| Key Specifications Overview
| Parameter | Hengyuhang HYH10VO Series 32 Specification (OEM Benchmark Standard) |
|---|---|
| Pump Classification | Axial Piston Variable Displacement Pump in Swashplate Design for Open Circuits (HYH10VO Series 32) |
| OEM Interchange Reference | Direct dimensional, functional, and hydraulic drop-in replacement for Rexroth A10VO Series 32 |
| Displacement Size Range | 5 Heavy-Duty Frame Sizes: 45, 71, 100, 140, and 180 cm³/rev (2.75 to 11.00 in³/rev) |
| Cradle Bearing Architecture | Hydrostatically unloaded cradle bearings significantly reducing mechanical friction and extending bearing fatigue life |
| Nominal Continuous Pressure (pnom) | 280 bar (4100 psi / 28 MPa) continuous working pressure at service port B |
| Maximum Peak Operating Pressure (pmax) | 350 bar (5100 psi / 35 MPa) maximum peak pressure within single operating periods (single period: 2 ms; total: 300 h) |
| Minimum High-Pressure Holding (pB abs) | 10 bar (145 psi) absolute minimum pressure required on high-pressure side to prevent internal slipper liftoff |
| Rate of Pressure Change (RA max) | 16,000 bar/s (232,060 psi/s) maximum permissible rate of pressure build-up and reduction across entire pressure range |
| High-Pressure Sensor Measurement Port (MB) | Standard pressure measurement port MB integrated directly on port plates 22/72 and 32/82 across all sizes |
| Pulsation Damping Feature | Optional internal pulsation damping available on port plates 32 and 82 for ultra-quiet operation |
| Rotational Speed Range (at Vg max, pabs = 1 bar) | Nominal drive speeds from 1800 rpm (Size 180) up to 3000 rpm (Size 45); Minimum continuous speed: 500 rpm |
| Suction Pressure Range (Port S Inlet) | Continuous pS min ≥ 0.8 bar absolute (12 psi) at 1800 rpm; Maximum allowable inlet pressure pS max ≤ 5 bar absolute (75 psi) |
| Case Drain Pressure Rating (Ports L, L1) | Maximum continuous case pressure pL max ≤ 2 bar absolute (30 psi); Case pressure must always exceed ambient pressure |
| Rotary Group & Swashplate Technology | Swashplate rotary group with steel slipper shoes, hardened barrel, dual return springs, and stable preloaded bearings |
| Mounting Flange Standards | ISO 3019-1 (SAE J744): SAE B 2-bolt / SAE C 4-bolt (Size 45); SAE C 2/4-bolt (Sizes 71, 100, 140); SAE D 4-bolt (Sizes 100~180) |
| Drive Shaft Configurations | ANSI B92.1a splined shafts: Code S (standard), Code R (reinforced torque), Code U (reduced diameter), Code W (high torque) |
| Working Fluid Ports (Port B Outlet) | ISO 6162-1 (Code 61) 1 in on sizes 45 & 71; ISO 6162-2 (Code 62 High Pressure) 1 1/4 in on sizes 100, 140, 180 (350 bar rated) |
| Suction Fluid Ports (Port S Inlet) | ISO 6162-1 (Code 61) split-flange: 1 1/2 in (size 45), 2 in (size 71), 2 1/2 in (sizes 100, 140, 180), 10 bar rated |
| Case Drain Fluid Ports (Ports L, L1) | ISO 11926 standard: 7/8-14 UNF-2B (sizes 45 & 71); 1 1/16-12 UN-2B (sizes 100 & 140); 1 5/16-12 UN-2B (size 180) |
| Sealing Material System | Code V: Premium FKM (fluorocarbon rubber) seals standard (-25°C to +110°C continuous, +115°C short-term) |
| Direction of Rotation | Clockwise (Code R) or Counter-Clockwise (Code L), viewed facing input drive shaft |
| Operating Viscosity Range | Optimum: νopt = 16 to 36 mm²/s; Permissible: ν = 10 to 400 mm²/s; Maximum cold start: νmax ≤ 1600 mm²/s |
| Fluid Cleanliness Standard | ISO 4406 Class 20/18/15 minimum (Class 19/17/14 recommended for high operating temperatures or extended life) |
| Through-Drive Capability | Standard through-drive (K-series for ports 12/62) and Universal through-drive (U-series for ports 22/72 & 32/82) up to 100% torque |
| Technical Performance Matrix Across Available Sizes
| Model Number (Hengyuhang Series) | Geometric Displacement Vg max (cm³/rev / in³) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min / gpm) | Drive Power @ 280 bar (kW / HP) | Torque Output @ 280 bar (Nm / lb-ft) | Rotary Stiffness c (Nm/rad) | Angular Accel. α (rad/s²) | Case Fill (L / gal) | Unit Mass m (kg / lbs) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal n_nom | Minimum n_min | Shaft S | Shaft R | w/o Thru N00 | Thru Kxx | Universal Uxx | |||||||
| HYH10VO-45 | 45.00 (2.75) | 3000 | 500 | 135.0 (35.7) | 63.0 (84.0) | 200.0 (148.0) | 37,500 | 41,025 | 4000 | 1.00 (0.264) | 25.8 (57.0) | 27.4 (60.0) | 32.6 (72.0) |
| HYH10VO-71 | 71.10 (4.34) | 2550 | 500 | 181.0 (47.8) | 85.0 (113.0) | 317.0 (234.0) | 71,884 | 76,545 | 2900 | 1.60 (0.420) | 40.4 (89.0) | 43.3 (95.0) | 51.8 (114.0) |
| HYH10VO-100 | 100.00 (6.10) | 2300 | 500 | 230.0 (60.8) | 107.0 (143.0) | 446.0 (328.0) | 121,142 | – | 2400 | 2.20 (0.580) | 56.4 (124.0) | 62.6 (138.0) | 76.0 (168.0) |
| HYH10VO-140 | 140.00 (8.54) | 2200 | 500 | 308.0 (81.4) | 144.0 (193.0) | 624.0 (460.0) | 169,537 | – | 2000 | 3.00 (0.790) | 70.5 (155.0) | 79.5 (175.0) | 90.2 (199.0) |
| HYH10VO-180 | 180.00 (11.00) | 1800 | 500 | 324.0 (85.6) | 151.0 (202.0) | 802.0 (592.0) | 227,153 | – | 2000 | 2.70 (0.710) | 75.2 (166.0) | – | 89.4 (197.0) |
| Control Devices & Operating Mechanisms
| Control Code | Control Classification | Control Signal & Pilot Supply | Functional Operation & Machine Application |
|---|---|---|---|
| DR | Hydraulic Pressure Controller | Internal pressure sensing up to 280/350 bar | Maintains constant hydraulic system pressure by swiveling pump displacement back towards zero when set pressure is reached; protects system against overload. |
| DRG | Remotely Controlled Pressure Controller | External pilot pressure relief valve connected via port X | Enables multi-pressure stage control or remote proportional pressure adjustment via an external remote relief valve connected to pilot port X. |
| DRF | Pressure and Flow Controller (Load-Sensing, X-T Open) | Load pressure signal connected at port X with open drain orifice | True load-sensing control that adjusts pump flow to match actuator demand while maintaining preset differential pressure (Δp = 14~22 bar); minimizes energy dissipation. |
| DRS / DRSC | Pressure and Flow Controller (Load-Sensing, X-T Plugged) | Port X plugged with internal flushing function (DRS) or without flushing (DRSC) | Load-sensing regulation designed for systems where the load signal line drain orifice is integrated externally inside the main directional control valve block. |
| ED71 / ED72 | Electrohydraulic Pressure Controller (Negative Characteristic) | Electric current signal (ED71: 12V DC / ED72: 24V DC, DEUTSCH DT04-2P) | Electrical proportional pressure setting; maximum pressure achieved at zero current (fail-safe high pressure), pressure decreases proportionally as solenoid current increases (ideal for fan drives). |
| ER71 / ER72 | Electrohydraulic Pressure Controller (Positive Characteristic) | Electric current signal (ER71: 12V DC / ER72: 24V DC, DEUTSCH DT04-2P) | Electrical proportional pressure setting with positive characteristic; minimum pressure at zero current, pressure rises proportionally with increasing control current. |
| LA5D~LA9D | Power Controller with Pressure Cut-Off (Hydraulic) | Hydraulic internal pilot pressure and mechanical hyperbolic spring curve | Overrides pressure and flow controls to limit drive engine torque and power absorption to a preset hyperbolic curve, preventing diesel engine stall across pressure tiers (LA5D: to 50 bar, LA6D: 51~90 bar, LA7D: 91~160 bar, LA8D: 161~240 bar, LA9D: via 240 bar). |
| LA.DS / LA.DG | Power Controller with Flow Control / Remote Pressure Cut-Off | Combined load-sensing signal (DS) or remote pilot relief (DG) with power limiter | Integrates hyperbolic power limiting with hydraulic load-sensing flow matching or remote multi-stage pressure adjustment. |
| EC4 / EB4 | Electrohydraulic Control Valve with Swivel Angle Sensor | Electric current 12V to 24V DC with integrated Hall swivel angle sensor PAL | Direct closed-loop electrohydraulic proportional displacement positioning with real-time electronic angle feedback. |
| Mounting Flange, Shaft and Port Specifications Across Sizes
| Size Model | Mounting Flange Standards | Drive Shaft Options (ANSI B92.1a / ISO) | Fluid Port Connections (Working, Suction, Drain & Pilot) |
|---|---|---|---|
| HYH10VO-45 | Code C: ISO 3019-1 (SAE J744 101-2 / SAE B 2-bolt: Pilot Ø101.6 mm, pitch 146 mm); or Code D: SAE C 4-bolt (Pilot Ø127.0 mm) | Code S: Splined 1 in 15T 16/32DP (ext. 45.9 mm); Code R: Splined 1 in 15T (reinforced); Code U: Splined 7/8 in 13T; Code W: Splined | Port B Working: ISO 6162-1 (Code 61) 1 in (350 bar, M10×1.5 or 3/8-16 UNC); Port S Suction: ISO 6162-1 1 1/2 in (10 bar, M12×1.75 or 1/2-13 UNC); Drain L/L1: 7/8-14 UNF-2B; Pilot X: 7/16-20 UNF-2B; Port MB: M14×1.5 |
| HYH10VO-71 | Code C: ISO 3019-1 (SAE J744 127-2 / SAE C 2-bolt: Pilot Ø127.0 mm, pitch 181 mm); or Code D: SAE C 4-bolt (Pilot Ø127.0 mm) | Code S: Splined 1 1/4 in 14T 12/24DP (ext. 55.5 mm); Code R: Splined 1 1/4 in 14T (reinforced); Code U: Splined 1 in 15T; Code W: Splined | Port B Working: ISO 6162-1 (Code 61) 1 in (350 bar, M10×1.5 or 3/8-16 UNC); Port S Suction: ISO 6162-1 2 in (10 bar, M12×1.75 or 1/2-13 UNC); Drain L/L1: 7/8-14 UNF-2B; Pilot X: 7/16-20 UNF-2B; Port MB: M14×1.5 |
| HYH10VO-100 | Code C: ISO 3019-1 (SAE J744 127-2 / SAE C 2-bolt: Pilot Ø127.0 mm, pitch 181 mm); or Code D: SAE D 4-bolt (Pilot Ø152.4 mm, pitch circle Ø228.6 mm) | Code S: Splined 1 1/2 in 17T 12/24DP (ext. 67.0 mm); Code U: Splined 1 1/4 in 14T 12/24DP; Code W: Splined 1 1/2 in 17T | Port B Working: ISO 6162-2 (Code 62 High Pressure) 1 1/4 in (350 bar, M14×2 or 1/2-13 UNC); Port S Suction: ISO 6162-1 2 1/2 in (10 bar, M12×1.75 or 1/2-13 UNC); Drain L/L1: 1 1/16-12 UN-2B; Pilot X: 7/16-20 UNF-2B; Port MB: M14×1.5 |
| HYH10VO-140 | Code C: ISO 3019-1 (SAE J744 127-2 / SAE C 2-bolt: Pilot Ø127.0 mm, pitch 181 mm); or Code D: SAE D 4-bolt (Pilot Ø152.4 mm, pitch circle Ø228.6 mm) | Code S: Splined 1 3/4 in 13T 8/16DP (ext. 75.0 mm); Code U: Splined 1 1/2 in 17T 12/24DP; Code W: Splined 1 3/4 in 13T | Port B Working: ISO 6162-2 (Code 62 High Pressure) 1 1/4 in (350 bar, M14×2 or 1/2-13 UNC); Port S Suction: ISO 6162-1 2 1/2 in (10 bar, M12×1.75 or 1/2-13 UNC); Drain L/L1: 1 1/16-12 UN-2B; Pilot X: 7/16-20 UNF-2B; Port MB: M14×1.5 |
| HYH10VO-180 | Code D: ISO 3019-1 (SAE J744 152-4 / SAE D 4-bolt: Pilot Ø152.4 mm, pitch circle Ø228.6 mm; 4 × Ø21.0 mm holes) | Code S: Splined 1 3/4 in 13T 8/16DP (ext. 75.0 mm); High-torque continuous power shaft | Port B Working: ISO 6162-2 (Code 62 High Pressure) 1 1/4 in (350 bar, M14×2 or 1/2-13 UNC); Port S Suction: ISO 6162-1 2 1/2 in (10 bar, M12×1.75 or 1/2-13 UNC); Drain L/L1: 1 5/16-12 UN-2B; Pilot X: 7/16-20 UNF-2B; Port MB: M14×1.5 |
| Through-Drive Options and Multi-Pump Combinations
| Through-Drive Code | Mounting Flange Standard | Internal Splined Coupling Hub | Port Plate Assignment & Machine Combination |
|---|---|---|---|
| N00 / U00 | Without through drive | None (closed rear housing end) | Single pump standalone open-circuit operation (N00 for ports 11/12; U00 for ports 22/32) |
| K01 / U01 | ISO 3019-1 82-2 (SAE A 2-bolt) | Spline ANSI B92.1a 5/8 in 9T 16/32DP | Auxiliary micro gear pumps (HYH-HGP-1A, AZPF) for pilot or steering circuits (Sizes 45~180) |
| K52 / U52 | ISO 3019-1 82-2 (SAE A 2-bolt) | Spline ANSI B92.1a 3/4 in 11T 16/32DP | Medium gear pumps, secondary open-circuit piston pumps (HYH10VO-18, HYH10VO-28) |
| K68 / U68 | ISO 3019-1 101-2 (SAE B 2-bolt) | Spline ANSI B92.1a 7/8 in 13T 16/32DP | Secondary HYH10VO-28/45, HYH10VSO-28/45, cast iron gear pumps (HYH-CB-FC) (Sizes 45~180) |
| K04 / U04 | ISO 3019-1 101-2 (SAE B 2-bolt) | Spline ANSI B92.1a 1 in 15T 16/32DP | Secondary HYH10VO-45/71, heavy-duty mobile gear pumps (Sizes 45~180) |
| K07 / U07 | ISO 3019-1 127-2 (SAE C 2-bolt) | Spline ANSI B92.1a 1 1/4 in 14T 12/24DP | Secondary piston pumps up to same frame size (Sizes 71~180) |
| K24 / U24 | ISO 3019-1 127-2 (SAE C 2-bolt) | Spline ANSI B92.1a 1 1/2 in 17T 12/24DP | Heavy secondary piston pumps (HYH10VO-100) (Sizes 100~180) |
| K15 / U15 | ISO 3019-1 127-4 (SAE C 4-bolt) | Spline ANSI B92.1a 1 1/4 in 14T 12/24DP | Heavy-duty 4-bolt auxiliary pump mountings (Sizes 100~180) |
| K17 / U17 | ISO 3019-1 152-4 (SAE D 4-bolt) | Spline ANSI B92.1a 1 3/4 in 13T 8/16DP | Heavy secondary piston pumps up to size 140/180 with 100% full-torque transfer (Sizes 140 & 180) |
| Direct Interchangeability and OEM Replacement Matrix (Rexroth A10VO Series 32)
| Hengyuhang Series Model | OEM Original Rexroth Reference Model | Flange & Shaft Standard | Interchangeability Verification Status |
|---|---|---|---|
| HYH10VO-45 | A10VO 45 DR / 32R-VSC12N00 (or DRF / 32R-VSC22U00) | SAE B 2-Bolt, 1 in 15T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-45 | A10VO 45 ED72 / 32R-VSC22U00 (Fan Drive, Port MB) | SAE B 2-Bolt, 1 in 15T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-71 | A10VO 71 DRF / 32R-VSC22U00 (or LA8D / 32R-VSC22U00) | SAE C 2-Bolt, 1 1/4 in 14T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-71 | A10VO 71 DRF / 32R-VSC32U00 (with Pulsation Damping) | SAE C 2-Bolt, 1 1/4 in 14T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-100 | A10VO 100 DRF / 32R-VSC22U00 (or LA8D / 32R-VSD22U00) | SAE C 2-Bolt / SAE D 4-Bolt, 1 1/2 in 17T | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-100 | A10VO 100 ED72 / 32R-VSC22U00 (Fan Drive, Port MB) | SAE C 2-Bolt, 1 1/2 in 17T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-140 | A10VO 140 DRF / 32R-VSD22U00 (or LA8D / 32R-VSD22U00) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-180 | A10VO 180 DRF / 32R-VSD22U00 (or LA9D / 32R-VSD22U00) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-180 | A10VO 180 DRF / 32R-VSD32U00 (with Pulsation Damping) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| Model Coding & Ordering Structure
| Code Field | Field Designation | Available Standard Codes | Technical Definition & Configuration Meaning |
|---|---|---|---|
| [01] Unit Type | Axial Piston Variable Pump | HYH10V | Swashplate variable displacement machine, nominal pressure 280 bar (4100 psi), max 350 bar (5100 psi) |
| [02] Mode | Circuit Operation Mode | O | Open-circuit hydrostatic drive pump |
| [03] Frame Size | Geometric Displacement (cm³) | 45 / 71 / 100 / 140 / 180 | Nominal displacement size Vg max in cm³/rev (45, 71.1, 100, 140, 180) |
| [04] Control Device | Displacement Control Mechanism | DR / DRG / DRF / DRS / DRSC / ED71 / ED72 / ER71 / ER72 / LA / EC4 / EB4 | DR: Pressure; DRF/DRS: Load-sensing; DRG: Remote pressure; ED/ER: Electrohydraulic fan; LA: Power limiter; EC4/EB4: Proportional |
| [05] Series | Series Designation | 32 | Series 3, Index 2 (Optimized cradle bearing and universal through-drive) |
| [06] Rotation | Direction of Rotation | R / L | Code R: Clockwise; Code L: Counter-Clockwise, viewed facing drive shaft |
| [07] Seals | Sealing Material System | V | Code V: Premium FKM (fluorocarbon rubber) seals standard (-25°C to +110°C continuous) |
| [08] Drive Shaft | Input Shaft Configuration | S / R / U / W | Code S: ANSI B92.1a standard spline; Code R: Reinforced spline; Code U: Reduced diameter; Code W: High torque spline |
| [09] Mounting Flange | Mounting Flange Style | C / D / U | Code C: ISO 3019-1 2-bolt (SAE B, SAE C); Code D: ISO 3019-1 4-bolt (SAE C, SAE D); Code U: Special mounting |
| [10] Working Ports | Service Port Configuration | 11 / 12 / 22 / 32 / 61 / 62 / 72 / 82 | Codes 11/12/61/62: Standard ports; Codes 22/72: Universal through-drive with MB port; Codes 32/82: With MB port & pulsation damping |
| [11] Through Drive | Rear Auxiliary Attachment | N00 / Kxx / U00 / Uxx | Codes N00/Kxx: Standard rear attachment (ports 12/62); Codes U00/Uxx: Universal through-drive (ports 22/72 & 32/82) up to 100% torque |
| [12] Connectors | Electrical Valve Connectors | Without code / P | Without code: Hydraulic controls; Code P: DEUTSCH 2-pin molded connector DT04-2P without diode (for electric controls) |
| Technical Performance Matrix Across Available Sizes
| Model Number (Hengyuhang Series) | Geometric Displacement Vg max (cm³/rev / in³) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min / gpm) | Drive Power @ 280 bar (kW / HP) | Torque Output @ 280 bar (Nm / lb-ft) | Rotary Stiffness c (Nm/rad) | Angular Accel. α (rad/s²) | Case Fill (L / gal) | Unit Mass m (kg / lbs) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal n_nom | Minimum n_min | Shaft S | Shaft R | w/o Thru N00 | Thru Kxx | Universal Uxx | |||||||
| HYH10VO-45 | 45.00 (2.75) | 3000 | 500 | 135.0 (35.7) | 63.0 (84.0) | 200.0 (148.0) | 37,500 | 41,025 | 4000 | 1.00 (0.264) | 25.8 (57.0) | 27.4 (60.0) | 32.6 (72.0) |
| HYH10VO-71 | 71.10 (4.34) | 2550 | 500 | 181.0 (47.8) | 85.0 (113.0) | 317.0 (234.0) | 71,884 | 76,545 | 2900 | 1.60 (0.420) | 40.4 (89.0) | 43.3 (95.0) | 51.8 (114.0) |
| HYH10VO-100 | 100.00 (6.10) | 2300 | 500 | 230.0 (60.8) | 107.0 (143.0) | 446.0 (328.0) | 121,142 | – | 2400 | 2.20 (0.580) | 56.4 (124.0) | 62.6 (138.0) | 76.0 (168.0) |
| HYH10VO-140 | 140.00 (8.54) | 2200 | 500 | 308.0 (81.4) | 144.0 (193.0) | 624.0 (460.0) | 169,537 | – | 2000 | 3.00 (0.790) | 70.5 (155.0) | 79.5 (175.0) | 90.2 (199.0) |
| HYH10VO-180 | 180.00 (11.00) | 1800 | 500 | 324.0 (85.6) | 151.0 (202.0) | 802.0 (592.0) | 227,153 | – | 2000 | 2.70 (0.710) | 75.2 (166.0) | – | 89.4 (197.0) |
| Hengyuhang Series Model | OEM Original Rexroth Reference Model | Flange & Shaft Standard | Interchangeability Verification Status |
|---|---|---|---|
| HYH10VO-45 | A10VO 45 DR / 32R-VSC12N00 (or DRF / 32R-VSC22U00) | SAE B 2-Bolt, 1 in 15T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-45 | A10VO 45 ED72 / 32R-VSC22U00 (Fan Drive, Port MB) | SAE B 2-Bolt, 1 in 15T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-71 | A10VO 71 DRF / 32R-VSC22U00 (or LA8D / 32R-VSC22U00) | SAE C 2-Bolt, 1 1/4 in 14T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-71 | A10VO 71 DRF / 32R-VSC32U00 (with Pulsation Damping) | SAE C 2-Bolt, 1 1/4 in 14T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-100 | A10VO 100 DRF / 32R-VSC22U00 (or LA8D / 32R-VSD22U00) | SAE C 2-Bolt / SAE D 4-Bolt, 1 1/2 in 17T | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-100 | A10VO 100 ED72 / 32R-VSC22U00 (Fan Drive, Port MB) | SAE C 2-Bolt, 1 1/2 in 17T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-140 | A10VO 140 DRF / 32R-VSD22U00 (or LA8D / 32R-VSD22U00) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-180 | A10VO 180 DRF / 32R-VSD22U00 (or LA9D / 32R-VSD22U00) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| HYH10VO-180 | A10VO 180 DRF / 32R-VSD32U00 (with Pulsation Damping) | SAE D 4-Bolt, 1 3/4 in 13T Spline | 100% Direct Physical & Functional Drop-in Replacement |
| Code Field | Field Designation | Available Standard Codes | Technical Definition & Configuration Meaning |
|---|---|---|---|
| [01] Unit Type | Axial Piston Variable Pump | HYH10V | Swashplate variable displacement machine, nominal pressure 280 bar (4100 psi), max 350 bar (5100 psi) |
| [02] Mode | Circuit Operation Mode | O | Open-circuit hydrostatic drive pump |
| [03] Frame Size | Geometric Displacement (cm³) | 45 / 71 / 100 / 140 / 180 | Nominal displacement size Vg max in cm³/rev (45, 71.1, 100, 140, 180) |
| [04] Control Device | Displacement Control Mechanism | DR / DRG / DRF / DRS / DRSC / ED71 / ED72 / ER71 / ER72 / LA / EC4 / EB4 | DR: Pressure; DRF/DRS: Load-sensing; DRG: Remote pressure; ED/ER: Electrohydraulic fan; LA: Power limiter; EC4/EB4: Proportional |
| [05] Series | Series Designation | 32 | Series 3, Index 2 (Optimized cradle bearing and universal through-drive) |
| [06] Rotation | Direction of Rotation | R / L | Code R: Clockwise; Code L: Counter-Clockwise, viewed facing drive shaft |
| [07] Seals | Sealing Material System | V | Code V: Premium FKM (fluorocarbon rubber) seals standard (-25°C to +110°C continuous) |
| [08] Drive Shaft | Input Shaft Configuration | S / R / U / W | Code S: ANSI B92.1a standard spline; Code R: Reinforced spline; Code U: Reduced diameter; Code W: High torque spline |
| [09] Mounting Flange | Mounting Flange Style | C / D / U | Code C: ISO 3019-1 2-bolt (SAE B, SAE C); Code D: ISO 3019-1 4-bolt (SAE C, SAE D); Code U: Special mounting |
| [10] Working Ports | Service Port Configuration | 11 / 12 / 22 / 32 / 61 / 62 / 72 / 82 | Codes 11/12/61/62: Standard ports; Codes 22/72: Universal through-drive with MB port; Codes 32/82: With MB port & pulsation damping |
| [11] Through Drive | Rear Auxiliary Attachment | N00 / Kxx / U00 / Uxx | Codes N00/Kxx: Standard rear attachment (ports 12/62); Codes U00/Uxx: Universal through-drive (ports 22/72 & 32/82) up to 100% torque |
| [12] Connectors | Electrical Valve Connectors | Without code / P | Without code: Hydraulic controls; Code P: DEUTSCH 2-pin molded connector DT04-2P without diode (for electric controls) |
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